arm: [MVE intrinsics] Fix condition for vec_extract patterns

Remove floating-point condition from mve_vec_extract_sext_internal and
mve_vec_extract_zext_internal, since the MVE_2 iterator does not
include any FP mode.

gcc/ChangeLog:

	* config/arm/mve.md (mve_vec_extract_sext_internal): Fix
	condition.
	(mve_vec_extract_zext_internal): Likewise.